x402basequality 0.35

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/364

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint at `/api/v1/payments/364` is labeled "Premium API Access" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — each request is paid individually via an X-PAYMENT header.

The broader platform advertises several API categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request. However, this specific listing is for the `/api/v1/payments/364` endpoint, whose exact functionality behind the "Premium API Access" label is not documented in detail.

Payments settle on the Base L2 network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The x402 challenge confirms the endpoint is live and accepting payment-gated POST requests with a 300-second timeout. Documentation pages beyond the landing page returned only a "Connect wallet" prompt, so detailed request/response schemas are unavailable.

Capabilities

x402-payment-gatedusdc-base-networkpay-per-requestno-api-keypost-methodjson-response

Use cases

  • —Accessing premium API endpoints without creating accounts or managing API keys
  • —Making one-off paid API calls from autonomous agents using USDC on Base
  • —Integrating pay-as-you-go API access into Web3 workflows

Fit

Best for

  • —Agents or developers who want zero-signup, per-call API access
  • —Users already holding USDC on the Base network
  • —Scenarios requiring low-friction micropayments for API calls

Not for

  • —Users who need detailed API documentation or OpenAPI schemas before integrating
  • —High-volume consumers who prefer subscription-based pricing over per-call fees
  • —Developers without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/364 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/364
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what "Premium API Access" actually returns, no request/response schema, and all doc pages beyond the landing page are empty. The exact functionality of this specific endpoint is unknown.

Warnings

  • —The exact functionality behind 'Premium API Access' at /api/v1/payments/364 is undocumented — it is unclear what data or service this endpoint provides.
  • —All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no usable content.
  • —No OpenAPI spec, request schema, or response schema is available.
  • —The platform lists many API categories (AI, finance, analytics, etc.) but none are documented in detail.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:05:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/dMXxEj
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart